Who is he? Because I think he's about to become a main character in our story, isn't he?

Yeah, so Graham Perks is a more senior colleague.

He'd been at the QMC for a number of years at this point.

Again, another highly respected, prestigious surgeon in a significant role.

Essentially, Peter Brooks doesn't like Graham Perks.

That's sort of the long and short of it, isn't it? That's the long and short of it, really, with this one.

So obviously, Peter Brooks, for whatever reason, he develops this animus against Graham Perks.

He sees his dad bleeding out on the floor and he jumps straight into action.